Security and privacy advocates argue that RFID tags could make it easier for hackers to target our private information, as RFIDs permeate every facet of everyday life...

Security and privacy advocates fear that 'smart' style personal objects (such as passports and credit cards) embedded with RFID tags have the potential to do more harm than good, particularly if recent news reports of 'RFID hacking' are anything to go by.

More so, Patrick Redmond, a long serving ex-IBM employee, lecturer and author on RFID technology, has come up with an eyebrow-raising new conspiracy about RFID tags: he believes that the television changeover from analogue to digital is not just for our entertainment, but is being used as a way to create the necessary bandwidth, which will be required to facilitate the introduction of RFID tagged objects into everyday items.

Though the conspiracy nuts might need not worry: RFID's are already here and companies are turning to new ways to keep tabs on us.

These RFID-stamped items range from the obvious (passports) to the not-so-obvious. In the latter camp, these include personal body products such as shaving blades.

Gillette, one of the largest shaving brands in the world, have been openly criticised by some online bloggers for embedding RFID chips in the packaging of some of their razor products.

A Boycott Gillette website has been set up to protest privacy fears.The website attacks Gillette for setting up spy cameras that snap pictures of purchasers whenever the tag detects being taken off the shelf.

The technology was developed at MIT labs, where it is better known as smart shelf technology, which may or might not be targeted towards thieves or as a method to better understand the shoppers who purchase these products.

Most of the time though, says Redmond, we won't even know we're wearing a tag. Redmond claims that RFIDs can track our every movement, a conceit not lost on the US military. The same kind of technology is now used in the battlefields of Iraq and Afghanistan to track wayward soldiers, although privacy concerns loom over just how the RFID tags work to keep marines safe.

But not everybody shares the view that RFIDs are bad. Some RFID advocates just don't see the same risks, inlcuding blogger Mark Roberti, who has written an interesting piece rebutting some of the recent hacking reports for RFID journal, the web's portal for everything RFID.

Introducing 'Little Brother'

Even though the first true RFID was invented in 1973, it's taken us 36 years to acutely realise the consequences of embedding the electronic tags into everyday life. It's not just a useful tool for freight and delivery automation services say security experts (where it was primarily used for years), but as a tool that more and more governments are frequently turning to, in order to keep tabs on our whereabouts.

Just ask certain American Express card holders in the US. Last year, Engadget ran a piece about how easy it was to hack an RFID-based credit card using an $8 reader. Other travel smartcards such as the UK oystercard have suffered similar fates; they too contain similar RFID tags, capable of transmitting data into the wrong hands.

Three types of RFID chips currently exist and most ship with internal battery sources. Newer types of RFID chips contain super batteries that can last for up to one hundred years; long enough to fulfil the job of transmitting and storing data over a person's lifespan.

Each RFID carries its own unique serial code and each transmits a wireless radio frequency over a number of metres. However, this personal wireles signal can often tell more about the user than we think.

RFIDs are everywhere

The RFID privacy issue becomes harder to ignore when you consider that almost 1.8 billion RFID tags were sold in 2005 alone.

That number is also likely to be a whole lot larger now that RFIDs are embedded in credit cards, driver licences and other everyday documents across the world.

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